Goodwill and Intangible Assets - Estimated Future Amortization Expense of Purchased Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2015
Jul. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity    
2015 (remaining six months) $ 4,279  
2016 4,829  
2017 2,018  
2018 1,764  
2019 1,031  
Thereafter 4,158  
Net Value $ 18,079 $ 19,505